/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:18:58,604 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:18:58,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:18:58,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:18:58,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:18:58,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:18:58,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:18:58,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:18:58,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:18:58,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:18:58,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:18:58,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:18:58,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:18:58,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:18:58,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:18:58,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:18:58,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:18:58,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:18:58,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:18:58,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:18:58,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:18:58,751 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:18:58,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:18:58,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:18:58,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:18:58,754 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:18:58,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:18:58,754 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:18:58,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:18:58,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:18:58,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:18:58,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:18:58,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:18:58,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:18:58,756 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:18:58,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:18:58,757 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:18:58,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:18:58,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:18:58,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:18:58,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:18:58,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:18:58,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:18:58,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:18:58,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:18:58,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:18:58,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:18:58,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:18:58,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:18:58,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:18:59,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:18:59,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:18:59,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:18:59,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:18:59,099 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:18:59,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c [2021-05-06 03:18:59,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ff95088/c0a081d8136240f59b938b3ef158947f/FLAG777c91c68 [2021-05-06 03:18:59,581 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:18:59,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c [2021-05-06 03:18:59,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ff95088/c0a081d8136240f59b938b3ef158947f/FLAG777c91c68 [2021-05-06 03:18:59,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ff95088/c0a081d8136240f59b938b3ef158947f [2021-05-06 03:18:59,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:18:59,619 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:18:59,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:18:59,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:18:59,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:18:59,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:18:59" (1/1) ... [2021-05-06 03:18:59,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a6a408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:18:59, skipping insertion in model container [2021-05-06 03:18:59,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:18:59" (1/1) ... [2021-05-06 03:18:59,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:18:59,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:18:59,744 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c[545,558] [2021-05-06 03:18:59,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:18:59,771 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:18:59,785 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c[545,558] [2021-05-06 03:18:59,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:18:59,818 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:18:59,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:18:59 WrapperNode [2021-05-06 03:18:59,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:18:59,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:18:59,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:18:59,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:18:59,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:18:59" (1/1) ... [2021-05-06 03:18:59,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:18:59" (1/1) ... [2021-05-06 03:18:59,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:18:59" (1/1) ... [2021-05-06 03:18:59,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:18:59" (1/1) ... [2021-05-06 03:18:59,870 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:18:59" (1/1) ... [2021-05-06 03:18:59,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:18:59" (1/1) ... [2021-05-06 03:18:59,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:18:59" (1/1) ... [2021-05-06 03:18:59,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:18:59,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:18:59,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:18:59,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:18:59,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:18:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:18:59,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:18:59,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:18:59,941 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:18:59,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:18:59,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:18:59,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:18:59,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:18:59,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:18:59,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:18:59,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:18:59,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:18:59,942 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:18:59,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:18:59,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:18:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:18:59,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:18:59,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:18:59,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:18:59,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:18:59,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:19:00,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:19:00,271 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:19:00,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:19:00 BoogieIcfgContainer [2021-05-06 03:19:00,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:19:00,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:19:00,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:19:00,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:19:00,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:18:59" (1/3) ... [2021-05-06 03:19:00,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd06622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:19:00, skipping insertion in model container [2021-05-06 03:19:00,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:18:59" (2/3) ... [2021-05-06 03:19:00,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd06622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:19:00, skipping insertion in model container [2021-05-06 03:19:00,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:19:00" (3/3) ... [2021-05-06 03:19:00,293 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound2.c [2021-05-06 03:19:00,297 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:19:00,300 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:19:00,315 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:19:00,344 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:19:00,344 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:19:00,344 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:19:00,344 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:19:00,344 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:19:00,344 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:19:00,344 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:19:00,345 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:19:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:19:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:19:00,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:19:00,368 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:19:00,368 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:19:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:19:00,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-06 03:19:00,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:19:00,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818688739] [2021-05-06 03:19:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:19:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:00,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:19:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:00,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:19:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:19:00,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:19:00,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818688739] [2021-05-06 03:19:00,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818688739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:19:00,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:19:00,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:19:00,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705575546] [2021-05-06 03:19:00,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:19:00,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:19:00,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:19:00,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:19:00,689 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:19:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:19:00,882 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-06 03:19:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:19:00,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:19:00,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:19:00,890 INFO L225 Difference]: With dead ends: 66 [2021-05-06 03:19:00,890 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:19:00,893 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:19:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:19:00,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 03:19:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:19:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 03:19:00,943 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 03:19:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:19:00,944 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 03:19:00,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:19:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 03:19:00,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:19:00,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:19:00,945 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:19:00,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:19:00,945 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:19:00,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:19:00,946 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-06 03:19:00,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:19:00,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728963046] [2021-05-06 03:19:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:19:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:01,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:19:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:01,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:19:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:19:01,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:19:01,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728963046] [2021-05-06 03:19:01,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728963046] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:19:01,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:19:01,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:19:01,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553370617] [2021-05-06 03:19:01,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:19:01,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:19:01,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:19:01,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:19:01,127 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:19:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:19:01,558 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 03:19:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:19:01,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:19:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:19:01,562 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:19:01,562 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 03:19:01,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:19:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 03:19:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 03:19:01,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:19:01,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 03:19:01,589 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 03:19:01,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:19:01,590 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 03:19:01,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:19:01,590 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 03:19:01,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 03:19:01,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:19:01,590 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:19:01,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:19:01,591 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:19:01,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:19:01,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-06 03:19:01,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:19:01,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275544471] [2021-05-06 03:19:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:19:01,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:19:01,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012268023] [2021-05-06 03:19:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:19:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:01,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 03:19:01,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:19:01,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:01,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:01,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:01,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:01,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:19:01,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:19:01,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275544471] [2021-05-06 03:19:01,835 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:19:01,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012268023] [2021-05-06 03:19:01,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012268023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:19:01,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:19:01,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:19:01,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941690704] [2021-05-06 03:19:01,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:19:01,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:19:01,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:19:01,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:19:01,838 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:19:01,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:19:01,854 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-06 03:19:01,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:19:01,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 03:19:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:19:01,855 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:19:01,855 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 03:19:01,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:19:01,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 03:19:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 03:19:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:19:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 03:19:01,862 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 03:19:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:19:01,863 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 03:19:01,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:19:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 03:19:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 03:19:01,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:19:01,863 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:19:02,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 03:19:02,077 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:19:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:19:02,077 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-06 03:19:02,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:19:02,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373650396] [2021-05-06 03:19:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:19:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:02,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:19:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:02,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:19:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:02,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 03:19:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:19:02,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:19:02,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373650396] [2021-05-06 03:19:02,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373650396] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:19:02,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:19:02,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:19:02,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279022721] [2021-05-06 03:19:02,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:19:02,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:19:02,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:19:02,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:19:02,256 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:19:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:19:02,523 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-06 03:19:02,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:19:02,523 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 03:19:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:19:02,524 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:19:02,524 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 03:19:02,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:19:02,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 03:19:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 03:19:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:19:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 03:19:02,531 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 03:19:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:19:02,532 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 03:19:02,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:19:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 03:19:02,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:19:02,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:19:02,533 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:19:02,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 03:19:02,533 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:19:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:19:02,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-06 03:19:02,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:19:02,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965534280] [2021-05-06 03:19:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:19:02,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:19:02,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835075013] [2021-05-06 03:19:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:19:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:02,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:19:02,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:19:02,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 03:19:02,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:19:02,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965534280] [2021-05-06 03:19:02,764 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:19:02,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835075013] [2021-05-06 03:19:02,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835075013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:19:02,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:19:02,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:19:02,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655942569] [2021-05-06 03:19:02,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:19:02,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:19:02,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:19:02,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:19:02,766 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:19:05,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:19:05,003 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-05-06 03:19:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:19:05,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:19:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:19:05,005 INFO L225 Difference]: With dead ends: 59 [2021-05-06 03:19:05,005 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 03:19:05,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:19:05,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 03:19:05,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 03:19:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:19:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-05-06 03:19:05,015 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2021-05-06 03:19:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:19:05,016 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-05-06 03:19:05,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:19:05,016 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-05-06 03:19:05,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:19:05,017 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:19:05,017 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:19:05,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:19:05,225 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:19:05,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:19:05,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-06 03:19:05,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:19:05,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137342221] [2021-05-06 03:19:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:19:05,233 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:19:05,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1025734785] [2021-05-06 03:19:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:19:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:05,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:19:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:19:05,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:05,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:05,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:05,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:05,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:05,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:05,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:05,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:19:05,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:19:05,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137342221] [2021-05-06 03:19:05,451 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:19:05,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025734785] [2021-05-06 03:19:05,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025734785] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:19:05,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:19:05,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:19:05,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993751380] [2021-05-06 03:19:05,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:19:05,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:19:05,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:19:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:19:05,455 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:19:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:19:05,517 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-05-06 03:19:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:19:05,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 03:19:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:19:05,521 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:19:05,521 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 03:19:05,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:19:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 03:19:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 03:19:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:19:05,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-06 03:19:05,547 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2021-05-06 03:19:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:19:05,549 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-06 03:19:05,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:19:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-06 03:19:05,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:19:05,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:19:05,552 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:19:05,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:19:05,776 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:19:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:19:05,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-06 03:19:05,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:19:05,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532089320] [2021-05-06 03:19:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:19:05,799 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:19:05,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708283210] [2021-05-06 03:19:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:19:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:05,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 03:19:05,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:19:06,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:06,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:06,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:19:06,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:19:06,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532089320] [2021-05-06 03:19:06,046 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:19:06,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708283210] [2021-05-06 03:19:06,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708283210] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:19:06,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:19:06,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:19:06,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329636915] [2021-05-06 03:19:06,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:19:06,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:19:06,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:19:06,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:19:06,048 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:19:06,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:19:06,236 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-06 03:19:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:19:06,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 03:19:06,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:19:06,238 INFO L225 Difference]: With dead ends: 82 [2021-05-06 03:19:06,238 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 03:19:06,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:19:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 03:19:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-06 03:19:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 03:19:06,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2021-05-06 03:19:06,251 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2021-05-06 03:19:06,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:19:06,252 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2021-05-06 03:19:06,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:19:06,254 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2021-05-06 03:19:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:19:06,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:19:06,255 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:19:06,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:19:06,482 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:19:06,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:19:06,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-06 03:19:06,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:19:06,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786662485] [2021-05-06 03:19:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:19:06,489 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:19:06,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521726038] [2021-05-06 03:19:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:19:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:06,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:19:06,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:19:06,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:06,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:06,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:06,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:06,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:06,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:06,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:06,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:19:06,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:19:06,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786662485] [2021-05-06 03:19:06,642 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:19:06,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521726038] [2021-05-06 03:19:06,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521726038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:19:06,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:19:06,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 03:19:06,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994315449] [2021-05-06 03:19:06,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:19:06,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:19:06,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:19:06,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:19:06,644 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:19:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:19:06,717 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2021-05-06 03:19:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:19:06,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 03:19:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:19:06,720 INFO L225 Difference]: With dead ends: 94 [2021-05-06 03:19:06,720 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 03:19:06,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:19:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 03:19:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 03:19:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 03:19:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-05-06 03:19:06,738 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 38 [2021-05-06 03:19:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:19:06,738 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-05-06 03:19:06,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:19:06,739 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-05-06 03:19:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 03:19:06,741 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:19:06,741 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:19:06,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:19:06,957 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:19:06,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:19:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-06 03:19:06,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:19:06,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782088535] [2021-05-06 03:19:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:19:06,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:19:06,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892178935] [2021-05-06 03:19:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:19:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:19:07,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:19:07,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:19:07,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:19:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:19:07,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:19:07,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782088535] [2021-05-06 03:19:07,245 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:19:07,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892178935] [2021-05-06 03:19:07,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892178935] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:19:07,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:19:07,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:19:07,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273599906] [2021-05-06 03:19:07,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:19:07,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:19:07,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:19:07,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:19:07,246 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:19:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:19:09,561 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2021-05-06 03:19:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:19:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 03:19:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:19:09,563 INFO L225 Difference]: With dead ends: 103 [2021-05-06 03:19:09,563 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 03:19:09,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:19:09,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 03:19:09,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-05-06 03:19:09,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:19:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2021-05-06 03:19:09,572 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 46 [2021-05-06 03:19:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:19:09,572 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2021-05-06 03:19:09,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:19:09,572 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2021-05-06 03:19:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 03:19:09,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:19:09,573 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:19:09,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:19:09,779 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:19:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:19:09,780 INFO L82 PathProgramCache]: Analyzing trace with hash -399036107, now seen corresponding path program 1 times [2021-05-06 03:19:09,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:19:09,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509264132] [2021-05-06 03:19:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:19:09,788 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:19:09,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422987023] [2021-05-06 03:19:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true